If you keep getting this error message, try the next solution.
Solution 3: Adjust your family settings

Family settings can block the display of content rated lower than the current rating settings for the console. Make sure you're not hiding content because of your family settings. You can adjust your settings either using your Xbox 360 console or online.

Adjust your family settings using your console

Sign in to the account that's having the issue, go to the Settings hub, and select Family.